Lightning-arrester



(No Model.)

J. HOREN.

LIGHTNING ARBESTBR;

No. 339,417 Patented Apr. 6, 1886.

WITNESSES: I VENTOR:

ATTOR N PETERS, MW WW0". 04 a UNITED STATns @ATENT Orrrcroc.

JOHN HOBEN, or oinana, NEBRASKA.

LlGHTbllNG-ARRESTER.

FJPECIiF-ICATIONforming part of Letters Patent No. 3395117, dated Apri6, 1886.

Application filed February 9,

Serial No. 191,355. (No model.)

Figure 1 is a side "iew of my improved lightningarrester. Fig. 2 is aplan view.

Similar letters of reference indicate corresponding parts in bothfigures of the drawings.

The object of my invention is to provide a lightning-arrester andautomatic cutout for the circuits of dynamo-electric machines.

My invention consists in an electromagnetconnected with the mainlinecircuit and provided with a pivoted armature and a pivoted barconnecting the ground-wire with one part of the lightningarrester andarranged to be moved by the armature of the electro-rnagnet, ashereinafter more fully described.

To the base A is secured an electro-rnagnet, B, of the usual. form, andin a post, 0, secured to the base A near the magnet B, is pivoted anarmature, D, which extends over the poles of the magnet 13, and isprolonged beyond the sides of the magnet and reduced in width to formthe arm a.

On post, I), projecting from the base A, is journaled a sleeve, E, ofinsulating material, carrying at its upper end a spirallyslotted cam, F.The cam F consists of a piece of tubing having similar butoppositely-arranged spiral slots in diametrically-opposite sides forreceiving the arm a of the armature D.

To the lower end of the sleeve E is secured ametallic bar, G, which iscapable of forming an electrical contact simultaneously with themetallic block 0, secured to the base A, and the bar (I! ofthelightningarrester H. Aspring, I, surrounds the sleeve E and issecured at one end to the cam F and at the opposite end to the base A.lVhen the armature D is attracted by the magnet 13, the arm a of thearmature is forced to the bottom of the cam F, turning the sleeve E inopposition to the tension of the spring I and bringing the bar G intocontact with the block 0 and the bar (1 of the lightning arrester, andwhen the armature D is released by the magnet in the manner presently tobe described the retraction of the spring I turns the sleeve E and camF, thereby raising the armature D by the engagement of the spiral slotsof the cam with the arm a, and at the same time turning the bar Gthrough a quarter of a revolution, bringing it into contact with a stop,0, secured to the base A. The linewire e is connected with thebinding-posts J J, and the posts are connected with the terminals of themagnet B. lhe post J is connected with the bar (1, of thelightningarrester H, which bar is arranged on the base A parallel withthe bar d. Theblock c is connected with the binding-post J, whichreceives the grournl-wiref. hen the current is working normally on thecircuit, the armature D is drawn down into the position shown in Fig. 1,and the bar G is held in contact with the block 0 and the bar d of thelightning-arrester H by the engagement of the arm a with the cam F.VVheu the line-wire is struck by lightning, the lightning in passingfrom the bar d of the lightning-arrester to the bar (I over the spacebetween the bars (1 d to reach the ground through the bar G, block 0,and ground-wire, forms an are between the bars (1 (7, when thedynanlo-curreut will continue to pass the space between the bars of thelightning-arrester to the ground for an instant, and the diversion ofthe current from the magnet B allows the magnet to become demagnetized,when the armature D will be released and the spring I will turn thesleeve E, so as to re move the bar G from the bar d of thelightningarrester and the block 0, when the arc will be broken and thedynamo-current will follow its original path through the electromagnet,the armature D will be again attracted, and the bar G will again beturned, forming an electrical communication between thelightning-arrester and the groundconductor, thus restoring theinstrument to its normal condition. Each dynamo-circuit will be providedwith two such lightning-arrestersone in each conductorso as to preventthe possibility of the lightning reaching the armature of thedynamo-electric machine and destroying it; also, to guard thelamps,motors,

and other machines placed in the circuit of 100 the dynamo againstinjury by lightning.

My improved device also indicates by its momentary action if thelightning-arrester is clogged with dust or any conductive material, soas to short-circuit the dynamo and send the current to the groundinstead of over the line.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination,with the bars d d of a lightning-arrester, of the barG, the groundconnections, the electro-magnet B, placed in thedynamo-circuit, and devices intermediate between the magnet and the barG, for causing the bar G to turn on its pivot when the electro-magnetceases to become active, substantially as herein shown and described.

2. The combination of the electro-magnet B, placed in the maindynamo-circuit, the lightning-arrester bar d, connected with theline-wire e, the bar (1, arranged parallel with the bar (2, the spiralcam F, the bar G, arranged to be moved thereby, the metallic block 0 andground-connections, and the pivoted armature D, placed above the magnetB and provided with the arm a, extending through the cam F,substantially as herein shown and described.

3. The combination, in a lightning-arrester for the circuits ofdynamo-electric machines, of the electro-magnet B, placed in thecircuit,

the lightning-arrester H, formed of the bars (1 d, the bar d beingconnected with the linewire, the armature D, pivoted in the post 0, heldwithin the field of the magnet B and provided with the arm a, the sleeveE, turning on the vertical post b, the cam F, secured to the sleeve andreceiving in its slots the arm a, the spiral spring I, surrounding the,sleeve and arranged to turn the sleeve and cam in opposition to thearmature D, the bar G, securedto the sleeve E, and the metallic block 0,provided with ground-connections, the bar G being arranged to be swungby the turning of the sleeve E into and out of contact with the bar (1and the block 0, substantially as herein shown and described.

' JOHN HOREN.

Witnesses:

LoUIs VIRTH, M. G. FROM.

